Did I brick my Conbee II?

I have a RPi4 with Homeseer as my smarthome solution. Uses z-wave, but now I want to implement zigbee. Got me a ConBee II, tried to flash the firmware before use, this was a couple of months ago. It failed. Put the Conbee away in despair, but now I need to fix the problem. I have googled my way through the internet and found no answer. So I tried every trick posted online, yes even -x 3. Using windows 11. When plugging in, I get the “USB has been inserted”-notification sound. 4 seconds later, I get the “USB has been unplugged”-notification sound. Tried it on two different laptops. Still get the same result:

PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00> .\gcfflasher -l
Path | Serial | Type
------------------±------------±--------------
COM3 | DE2692902 | ConBee II
PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00> .\gcfflasher -d com3 -f deconz_conbeeii_0x26780700.bin.gcf
read file success: deconz_conbeeii_0x26780700.bin.gcf (163244 bytes)
flash firmware
command reset timeout
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00>

I am not good at this, please help.

Anders, Norway.

Hi the ConBee II can’t be bricked since the bootloader is fixed. However if not valid firmware is installed it can be a bit tricky to recover.

From the wiki https://github.com/dresden-elektronik/deconz-rest-plugin/wiki/Update-deCONZ-manually#what-if-conbee-all-versions-still-refuses-to-flash

  • Unplug the ConBee and wait 10 seconds
  • Issue the command to flash, make sure you you’ve selected the correct device on your system for the -d parameter and also ensure to use -t 60 -x 3
GCFFlasher -d COM3 -f deconz_conbeeii_0x26780700.bin.gcf -t 60 -x 3
  • Attach the ConBee again

Thank you for your assistance! :slight_smile:

I tried your solution before, I now tried it again. Same result:

PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00> .\gcfflasher -l
Path | Serial | Type
------------------±------------±--------------
COM3 | DE2692902 | ConBee II
PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00> .\gcfflasher -d com3 -f deconz_conbeeii_0x26780700.bin.gcf -t 60 -x 3
read file success: deconz_conbeeii_0x26780700.bin.gcf (163244 bytes)
flash firmware
command reset timeout
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3
retry connect bootloader com3

It just continues into eternity…

And with the same “USB connected”- and “USB unplugged”-notification sound.

Now I am frustrated.

I’m not 100% sure but I think you need to use COM3 not com3.
Can you please try this.

1 Like

Djeezezz lord!
I plugged in the stick, run the command WITH COM3 (in capitol letters). Case solved!

PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00> .\gcfflasher -d COM3 -f deconz_conbeeii_0x26780700.bin.gcf -t 60 -x 3
read file success: deconz_conbeeii_0x26780700.bin.gcf (163244 bytes)
flash firmware
connect \.\COM3, baudrate 115200
send: C00B03000C0005002602000000B9FFC0 (16)
recv_packet: 0B03000800010026 (8)
command UART reset done
recv_packet: 0E04000700A200 (7)
connect \.\COM3, baudrate 115200
query bootloader id V1
send: 4944 (2)
bootloader detected
send: 1A1CA9AE (4)
bootloader synced: unlock! READY
send: 9E7D02000050000001A5 (10)
0% uploading #… send: send: send: send: send: send: send:
3% uploading ##… send: send: send: send: send: send: send:
6% uploading ####… send: send: send: send: send: send: send:
9% uploading ######… send: send: send: send: send: send: send:
12% uploading ########… send: send: send: send: send: send: send:
15% uploading ##########… send: send: send: send: send: send: send:
18% uploading ############… send: send: send: send: send: send: send:
21% uploading ##############… send: send: send: send: send: send: send:
25% uploading ################… send: send: send: send: send: send: send:
28% uploading ##################… send: send: send: send: send: send: send:
31% uploading ####################… send: send: send: send: send: send: send:
34% uploading ######################… send: send: send: send: send: send: send:
37% uploading #######################… send: send: send: send: send: send: send:
40% uploading #########################… send: send: send: send: send: send: send:
43% uploading ###########################… send: send: send: send: send: send: send:
47% uploading #############################… send: send: send: send: send: send: send:
50% uploading ###############################… send: send: send: send: send: send: send:
53% uploading #################################… send: send: send: send: send: send: send:
56% uploading ###################################… send: send: send: send: send: send: send:
59% uploading #####################################… send: send: send: send: send: send: send:
62% uploading #######################################… send: send: send: send: send: send: send:
65% uploading #########################################… send: send: send: send: send: send: send:
69% uploading ###########################################… send: send: send: send: send: send: send:
72% uploading #############################################… send: send: send: send: send: send: send:
75% uploading ##############################################… send: send: send: send: send: send: send:
78% uploading ################################################… send: send: send: send: send: send: send:
81% uploading ##################################################… send: send: send: send: send: send: send:
84% uploading ####################################################… send: send: send: send: send: send: send:
87% uploading ######################################################… send: send: send: send: send: send: send:
90% uploading ########################################################… send: send: send: send: send: send: send:
94% uploading ##########################################################… send: send: send: send: send: send: send:
100% uploading ############################################################. send: send: send: send: send: send: send:
100% uploading ############################################################# send: EB4752E378D2BBDE71B4CEC18339233B94801DEB19B8C7D4AE7A9E70241EEA053B96AA4185F8EAF7284ADEA8D9F57C94C136F3BF60B6E988B7D342B05144AD908EDDD3602DAF420C892A4B78F4BB96025E91076528D30BD993547D0F74989C410A3F8E5F7B76273CD59D955DE03605E32A747534652EB3D21338642253D620866EEEDB02324430A531E093170119237671936EE7C320346F0100FFC5022C (158)

done, wait validation…
firmware successful written
PS C:\Users\KMH18\GCFFlasher_Win_V4_05_02\GCFFlasher_Win_V4_08_00>

All this time, and I could just have pressed “shift” for some seconds…

Thank you for your help and actually spotting the tiny problem! Much appreciated!!! :smiley:

Best regards, Anders.

2 Likes

Ok so I have learned something too ^^.

Stupid follow-up question:

Since I am using a Raspberry Pi with Linux installed, shouldn’t I flash the stick with something else than Conbee II-firmware? Like Raspbee II or Rpi (DeCONZ_RaspbeeII_0x2678700.bin.GCF or DeCONZ_Rpi_0x26400500.bin.GCF)?

Nope you have the correct firmware. The others are for different products.

manup: Thank you for your help!

I don’t know if I need to start a new thread or I can continue in this one… I’ll try my luck:

I recon the stick isn’t plug 'n play and needs to be installed into my RPi4, linux v5.10.103. So I read the manual at ConBee II Installation

I don’t know anything about Linux so I just copied what the installation manual says. Can anyone tell me if I am doing it right? Here is the log (I ran the “sudo gpasswd -a $USER dialout”-command line first and logged out and in again):

homeseer@192.168.10.113’s password:
Linux HS4PiV6 5.10.103-v7l+ #1529 SMP Tue Mar 8 12:24:00 GMT 2022 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Mar 13 19:57:07 2025 from 192.168.10.129
homeseer@HS4PiV6:~ $ wget -qO- https://phoscon.de/apt/deconz.pub.key | gpg --dearmor | \sudo tee /etc/apt/trusted.gpg.d/deconz-keyring.gpg >/dev/null
[sudo] password for homeseer:
homeseer@HS4PiV6:~ $ sudo sh -c “echo ‘deb http://phoscon.de/apt/deconz \generic main’ > /etc/apt/sources.list.d/deconz.list”
homeseer@HS4PiV6:~ $ sudo apt update
Get:1 Index of /debian buster InRelease [54.2 kB]
Get:2 Index of /raspbian buster InRelease [15.0 kB]
Ign:3 http://phoscon.de/apt/deconz \generic InRelease
Err:4 http://phoscon.de/apt/deconz \generic Release
404 Not Found [IP: 144.76.96.194 80]
Hit:5 https://download.mono-project.com/repo/debian stable-raspbianbuster InRelease
Get:6 Index of /debian buster/main armhf Packages [400 kB]
Reading package lists… Done
E: The repository ‘http://phoscon.de/apt/deconz \generic Release’ does not have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
homeseer@HS4PiV6:~ $ sudo apt install deconz
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package deconz
homeseer@HS4PiV6:~ $

n00b greetings,
Anders

I think buster (your Debian version) is not supported anymore (as its end of life since 2022).

Thank you for the feedback. So what do I do now? It there a way to upgrade my operative system? Hoping for not having to include every singel device again…

You can update Raspbian with a command line, without losing data, but personally I do not recommend it (purely personnal)
Make a backup of your zigbee network using Phoscon an restore it on recent OS. Take care during the “power off”, some device like Aqara sensor leave the network if they are without parent too long time.